Amal Kumar Harh. (2001). Knowing a negative fact: Anupalabdhi. New Bharatiya Book Corporation.
Dyfyniad Arddull ChicagoAmal Kumar Harh. Knowing a Negative Fact: Anupalabdhi. New Delhi: New Bharatiya Book Corporation, 2001.
Dyfyniad MLAAmal Kumar Harh. Knowing a Negative Fact: Anupalabdhi. New Bharatiya Book Corporation, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.